/boot/boot was already removed from 5-current, so it is safe to
remove from 4-stable also. However, 5-current floppy image has yet
another hack by hosokawa-san which introduces 'kernel module floppy',
and saves lots of sizes of kernel.gz itself (and have a chance to put
back missing device drivers described in GENERIC kernel).
Anyway, it's a good news if kgziped /boot/loader works fine. I've
tested with today's 4-stable /boot/loader: